A Modern Concept of the Cell as a Structural Unit

1940 ◽  
Vol 74 (750) ◽  
pp. 5-24 ◽  
Author(s):  
George A. Baitsell
Author(s):  
Kenneth M. Richter ◽  
John A. Schilling

The structural unit of solid state collagen complexes has been reported by Porter and Vanamee via EM and by Cowan, North and Randall via x-ray diffraction to be an ellipsoidal unit of 210-270 A. length by 50-100 A. diameter. It subsequently was independently demonstrated by us in dog tendon, dermis, and induced complexes. Its detailed morphologic, dimensional and molecular weight (MW) aspects have now been determined. It is pear-shaped in long profile with m diameters of 57 and 108 A. and m length of 263 A. (Fig. 1, tendon, KMnO4 fixation, Na-tungstate; Fig. 2a, schematic of unit in long, C, and x-sectional profiles of its thin, xB, and bulbous, xA portions; Fig. 2b, tendon essentially unmodified by ether and 0.4 N NaOH treatment, Na-tungstate). The unit consists of a uniquely coild cable, c, of ṁ 22.9 A. diameter and length of 2580-3316 A. The cable consists of three 2nd-strands, s, each of m 10.6 A.


Author(s):  
A.A. Lavrentiev ◽  
◽  
V.V. Sidorkin ◽  
E.A. Gamoyunov ◽  
A.S. Rusaleev ◽  
...  

The article explores ways of forming a modern concept of rational nature management of agricultural waste. The analysis of the nomenclature of agricultural waste was carried out, their influence on the environmental situation was studied. The modern technologies of rational nature management of agricultural waste are systematized, the most promising areas of waste recycling are identified. The ecological effect of the application of technologies for the rational environmental management of agricultural waste was studied.


2012 ◽  
Vol 57 (2) ◽  
pp. 150-161
Author(s):  
Leander Scholz

Als der Künstler Gregor Schneider im Frühjahr 2008 ein Kunstprojekt ankündigte, bei dem ein Mensch, der im Sterben liegt, im Rahmen einer künstlerischen Performance ausgestellt werden sollte, waren die Reaktionen überwiegend äußerst kritisch. Während Gregor Schneider sein Projekt explizit als einen humanistischen Beitrag verstand, der sich gegen die Tabuisierung des Sterbens richten sollte, sahen die meisten Kommentatoren darin eine pietätslose Preisgabe des Sterbenden an die voyeuristischen Blicke des Publikums. Vor dem Hintergrund dieser Diskussion geht der Aufsatz der Frage nach, was es bedeutet, den Tod eines Menschen wie ein künstlerisches Werk zu inszenieren, und ordnet den Anspruch einer nicht nur ethischen, sondern auch ästhetischen Selbstbestimmung angesichts des Todes in die humanistische Tradition des modernen Werkgedankens ein.<br><br>In the spring of 2008, the artist Georg Schneider announced an art performance with a mortally ill person. Most of the responses to this art project were very critical. While the artist argued that the exhibition of a dying person should be understood as a humanistic intervention against the social taboo of death, commentators often criticized the exhibition as voyeuristic. Based on this discussion, the article explores what it means to stage a dying person as a piece of art and investigates the historical conditions of this project by locating the longing for ethic and aesthetic self-determination within the humanistic tradition of the modern concept of the work of art.


Author(s):  
O. S. Levin ◽  
E. E. Vasenina ◽  
A. Sh. Chimagomedova ◽  
N. G. Dudchenko

Te lecture presents modern concept of the symptoms, diagnosis and treatment of dementia with Lewy bodies (DLB), which accounts for about 10% of cases of dementia. Te nosological status of DLB and the problem of ratio of DLB and Parkinson’s disease which, apparently, represent two phenotypic variants of one neurodegenerative process («diseases with Lewy bodies») are considered in historical aspect. Approaches to the diagnosis and coding of DLB in accordance with ICD-10 are proposed. Te role of cholinesterase inhibitors, antipsychotics, levodopa, rasagiline and other drugs in the treatment of patients with DLB is аnalyzed.


Author(s):  
D. A. Lebedeva ◽  
Yu. A. Shcheglov

This work scrutinizes modern bioethical concepts of the use of animals for scientific purposes, as well as legal aspects of its use. Initially, the authors present a brief excursion into the history of bioethics and then focus on the modern concept of ethical attitude to the animals used for scientific purposes. The authors analyze the EU Directive on the protection of animals used for scientific purposes, as well as the EAEU acts and by-laws of the EAEU member states, and conclude that it is necessary to adopt a supranational act within the EAEU that will regulate the use of animals for scientific purposes in accordance with the principles of reduction, replacement and refinement.


Sign in / Sign up

Export Citation Format

Share Document